Desk calendar holder



FIG. 1 is a top, front, and right side perspective view of a desk calendar holder showing my new design;

FIG. 2 is a bottom, rear, and left side perspective view of thereof;

FIG. 3 is a top plan view thereof; and

FIG. 4 is a front elevational view thereof. 

The ornamental design for a desk calendar holder, as shown and described. 